Fix for bug #2871749 where rectangular selection Shift+Alt+Down could not move through wrapped lines.
Fix for bug #2871749 where rectangular selection Shift+Alt+Down could not
move through wrapped lines.

R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone